Safety auxiliary application valve



July 26, 1949. s. w. RUSSELL SAFETY AUXILIARY APPLICATION VALVE OriginalFiled Dec. 5,"1946 mv 3. I mv R mv R m l mu mm A wm 2 Q Q wn 6% I Q k RA A w \w m 0% mm k w A f 9 wv v N i 5am W. Russell IN VENTOR.

9 BY #MW Patented July 26, 1949 1 UNITED STATES PATENT OFFICE 2,477,496ISAFETYVAUXILIARY APPLICATION VALVE Sam Wlltussell, Knoxville, Tenn.Original application December 3, 1946, Serial No.

, 713,673. Divided and this application February 25, 1948, Serial No.10,831

This'invention relates to tractor-truck and trailerbrake equipment,andthe present ap plication is a division of my co-pending applicationfor U. S. Letters Patent Serial No. 713,673, filed December 3, 1946.

The present invention has particular reference to a safety auxiliaryapplication valve for installation in the emergency line oftractor-truck and trailer brake equipment,whereby to automatically ventthe emergency rela valve to the atmosphere and therebycause applicationof the trailer brakes in case the driver of the truck should lean orfall forward, while driving, due to falling asleep or becomingunconscious.

The primary object of thepresent invention is to provide a safetyauxiliary application valve" a safety application valve of the abovekind which may be readily installed in existing brake equipments, whichis highly efiicientin operation, and which is comparatively simple inconstruction.

The exact nature of the present invention, as well as more specificobjects and features thereof, will-become apparent from the followingdescription when consideredin connection with the accompanying drawings,in which: t

Figure 1 is a central vertical sectional view of a safety applicationvalve constructed in accordance with the present invention and in itsnormalpositlon.

,Figure 2 is a view similar to Figure 1, showing the safety applicationvalve in its operated condition.

Figure 3 is a fragmentary horizontal section taken online 3-3 of Figurel.

Figure 4 is a fragmentary somewhat diagram matic side elevational viewdrawn on a reduced scale andshowing the present application valveoperatively associated with the drivers seat of a tractor-truck.

Referring in detail to the drawing, the present safety auxiliaryapplication Valve, indicated atZl, is adapted to be interposedin theemergency line of a tractor-truck and trailerbrake; equipment, andisadapted to be arranged on the: tractor-truck nearithe drivers seat 28ofthe;

' 5 Claims. (c1. 277-21) latter, as disclosed in my above-mentionedcopending application. 1

The present application valve 21 is preferably of the construction shownin Figures 1 to 3 inclusive and includes a suitable casing 29 divided bypartition 30 into chambers 3| and 32. The partition3l has a centralopening 33 aiiording communication between the chambers 3|" and 32, anda valve seat 34 is formed in the upper-side of the partition 30insurrounding relationtothe opening 33. A valve head 35 is arranged toseat downwardly on the seat 34, and this valve head is provided on theintermediate portion of a vertical tubular stem 33 that extends throughthe opening 33 of partition 30. The margin of a diaphragm 3'! is clampedbetween an internal munication between lower chamber 3| and thetop'chamber 39, and the opening 33 provides for communication betweenthe lower chamber 3| The cover 38 in communication with the atmosphere.Casing 29 has a port 43 at each of opposite sides which openinto thechamber 32, and a port 44 at each of opposite sides which open into thechamber 3|. In use, the ports 43 and 44 at either side are used toinstall the valve inthe emergency line of the brake equipment, the othertwo ports 43 and A valve head 46' 44 being closed by plugs 45. isarranged to seat upwardly against the lower end of the stem 36 Withinthe lower chamber 3|,

and this valve head 46 is carried by the lower end of a vertical stem 41which freely extends through the stem 36 and through the cover 38, andwhichis of considerably less diameterthan the bore of stem 36. The valvehead 46 has a central depending guide stem 48 slidably received in atubular guide 49 provided on the bottom of the casing 29. The valve head35 is normally practice, the chamber 3|.iis placed in communi-o.

cation with the side of the emergency line which vention will beunderstood and appreciated by connects with an emergency relay valve,and the those skilled in the art. Modifications and chamber 32 isconnected with the side of the changes in details of construction arecontememergency line which communicates with a truck plated within thespirit of the invention as reservoir. It will thus be apparent that whenclaimed. a a V the valve 21 is in its normal condition of Fig- Havingdescribed the invention, whatisolaimed ure 1, the valve head 35 willclose communication as new is:

between the truckgreservoir and the I'QlillFVfilVBi 1LA= safety:auxiliary application: valve for and valveheadfl$is unsated soas tovent'tha tractor-truck and'trailer brake equipment comr lay valve to theatmosphere through valve prising a casing, a partition and a diaphragmstem 36, chamber 39 and vent 42. This v'entin idividing said easing intothree compartments, of the relay valve acts the same aster, breakin- Vmeansrventing one of said compartments to the e emergency line andcauses application of atmosphere,saidpartition having an opening and thetrailer brakes exactly the same-s allies-die pmvidediwithza valve seatin surrounding relation y b e i he em e y. line Will dos. HOW- to saidopening, alvalv:e member including a valve ever, if the valve stem 47 isgelled nwa iy: headiarramgeditotengage the partition seat and a i s theacti n O p gs 51? and 80* ante; a tubular, openlended stem connected onone end seat the valve head 46 against the lower end of to thediaphragm, said stem extending through stem 36 and to unseat the valvehead 35 aseshcwn.- tha opening of the partition to provide comn ure m nati will e e a i e munication between said one chamber and anbetween,thefir leyvalvaand he'tnuck reservoir: 7 other oilsaidqehambers,thaopeninaimthe partiby way of opening 33, and communication, at tionafiording communication:betweezi-saidians the relax valvey w thh eatmeeher r-will be closed othee chamber; andtthethird-remaining: chamber;biteati of. velveuheadv. 45 g t he W L ofthezcasinakyieldablemeansnormallyyaetinggtm endof; valve stem i6; therebcausing; release-oil seat said valve head, a secondf valvmheadarraneedii e e I to-lseati againstvsaidtubularsten-i: toclose cem- EiYQl wee 'laits endsla fleih 5-2} to the: too; munieation: betweemsaidsanother;chamber and-i iA Y e k, es i let drivers' seat. 2&' ailevei'. said oncechamber, ,vieldablameansa to: normally .3; armor wh ch iS r'elivel-ygzendx sunseat .said-i second valve? head and means im.fprward'and downwardly in fr n f n i jacentt 1 l gling aybaekmest levenconnected to-said secondi eue e s mention. of said b krest. The; other;valve; head and: operable;: forr seating 1 the; latter: shorter arm oileveri 53 ;isconnected by alink-5th againstlthe tubular-valve:stemandithen unseatingi with hez ppere en fi rlil estem 4J 1'?"the-second'valver-headagainst:theactionscfifsaida ran ementis $11011- ih w t e driven, occ ying; first named yielda'bletmeansa H h seatlflleanstbee we dlyg ein tthesbaclsrests 2; safetyiauxiliary application:valve for otseatll! and-assum P Re n iti eieridriv tractorrtmcki andtrailer: brakaeqni mentiemm 112, fi edmaarm' rofi'lever 3.;Wpressedireamprising; a casing; as partition a diaphragm we rdly o" asotau e thalink-i 54 to tie-pulled; dividingeam; casing;intoathree-pompartmentm pw rdly and-th reby eatlv iv ih adqfieandmeanssventinge one of said compaatmentsstoutlw:

im l an o sl a e e ed 46 n demagthissr, 4H atmosphere; said.part-itionrhaivingzam openinggancti E E P I- i s mpgn s ed until he v li efi i is provided-withm valveaseats in: surrounding; relaen a e e r:nd f; tem: :1, wh n u em tion to saidzropening, azvalve'm'emberrincludmgiaa stem K 35? :iselevated andl pring itisscomnresaodavalveeheadiarranaedqtden aseethexpartitiomseatt rAsabefote s t dt i slish sr ommunie twee andreetubiilarnpeneendedestemeconnectetkataone:

betyveenthe ru krvoir: nd hezrel alli s 4-5; end to the diaphragm, saidstems extending:

tW y-DfvpPenii l; fi r imule through thaiopeningrof {the 'zpart-itionatoiprovide 791389115157 l communicat'mni bfii-tweer-iecng'mwmmunicatiombetween a said' one: chambers ands i anotherioisaidschambers,thezopeniirgnmthemasa titionaficrd-ingconnnunicatiombetweemsaidpnne- 7. 9 1m 026. t e; othezchamberanditheithirdtremaining chamlo'em' 11y i et dii oft;tnelacasing,;.yieldable:meansanormallwacting togseat; said; valve: heads, a: second:valve theadtr arran ed -,toiseatiagainstsaidtubularastematmciosetcommunioatiombeimeen saide annthen chambers? alv resumenz mormalr ndi ienaas ,and said one chamhemvandeyieldahimmeansstoeafi eu el i he-cz leyq 'i e -irkh eiveni ednormallyiunseatisaidssecondsvalve headi tmes ee b -i a fac am-h dts emie v 3i'hAi-nsafeiali annaiiar a noatione valve-' fore el 4 i ntn e ommunca iemiwifl: 1 tractoretrncliiandi traile sbralseeequipmenttcom m eeeusvz l edi tw entthee e ait valves prising a casing,'a partition'andavdiaphnagzmzi nd-z r c rese r: ies e iev s -hszdiea GQF dividimgesaisacasingi intozathneet-comqaartnrents, phreemrofttherelay:valveifromiairipressureisms meansaventine onerofesaidcompantmentsctoethe elztocei sezai cebex ppliediftoitheitrailerrhrakeeatmosphere, said partition having an openingiamde ctuatorsn t ere ya imyinsar hea raileetcaisest providediwithiaevalvei-seat suriroundingrelain afmannerrgenerally well knoWnvim-the antmvitl'iza tion to saidopening, a .valv member fin'cludiitg respect;,-to; ,theoocurrencee ofaarnordinary ibrealtr 65,. valve'iheati sarranged;tozengageitliespartitioirseat ina hesemereency; linee fi he equipments,Assist. tubulaat openiendedvstemiconnected at also, 1 show inaboveementicnedzccependingz va1t a r' n tei mpr l raker communicationbetween said one cl iarn loe equipment-101' in; brake;equipment'izemhodyinezc7m anotneneof saidtchambersg thec-openingwihydraulic brakesgon the tractoretruckeaeteatedms amtit e omm a t msbet gs ms e l a e t rrxz ndsivacuumibrakes' on; thee anuth'erec elk-and r m ymm s a s; r il -:1 a o bemofithe casiirgziyieldabie means normazlly"aetFromzthez fQFEQOiiIEY'LdESCHPbiHHZLtlie' constmcea iri'gwtoeseaaidfvalve headta seeond valvedieadfi enda'tw said; stem: extendi g tstimation; the., ,presen lauxiliamyziappli'cationt,thronghathe-zopmingtofithezpattitiomtorprovid tienz operationzandxladvantagesioiatheepresent inea '15s arrangedi to aseat eagain stsaid'fi tfiibultiwsterrc tde V close communication between said anotherchamber and said one chamber, yieldable means to normally unseat saidsecond valve head, and means including a back rest lever connected tosaid second valve head and operable for seating the latter against thetubular Valve stem and then unseating the second valve head against theaction of said first named yieldable means, and means to facilitateinterposition of the casing in the emergency line of the brake equipmentwith said another chamber and the remaining third chamber of the casingrespectively communicating with the portions of the emergency linebetween which the casing is interposed.

4. A safety auxiliary application valve for tractor-truck and trailerbrake equipment comprising a casing, a partition dividing said casinginto a lower chamber and an intermediate chamber, a diaphragm dividingsaid easing into an upper chamber, means venting said upper chamber tothe atmosphere, said partition having an opening and provided with avalve seat in surrounding relation to said opening, a valve memberincluding a valve head arranged to engage the partition seat and atubular open ended stem connected at one end to the diaphragm, said stemextending through the opening of the partition to provide communicationbetween said lower chamber and said upper chamber, the opening in thepartition affording communication between said lower chamber and saidintermediate chamber, yieldable means normally acting to seat said valvehead, a second valve head arranged to seat against the lower end of saidtubular valve stem to close communication between the lower cham ber andthe upper chamber, yieldable means to normally unseat said second valvehead, and operating means connected to said second valve head andoperable for seating the latter against the tubular valve stem and thenunseating the second valve head against the action of said first namedyieldable means upon upward movement of said second valve head.

5. The construction defined in claim 4, wherein said operating meansincludes a back rest lever connected to said second valve head andadapted to be mounted adjacent the back rest of the drivers seat of thetractor-truck, whereby to raise the second valve head when said backrest lever is pressed rearwardly.

SAM W. RUSSELL.

No references cited.

